[retube]

The technology in the linked article would appear, at least superficially, to be similar to RFID. Although one difference might be that RFID works at a fixed frequency (to match the harmonic frequency of the receiving radio circuit) whereas this apparently works with "ambient" radio, implying a broad spectrum of frequencies, which is quite clever.

Either way, the broadcast signal is losing power at a rate proportional 1/d^2. So these devices necessarily have to work at very low power. What Tesla did - or is supposed to have done - was to figure out how to transmit power without the 1/d^2 loss. I.e, much like a collimated laser beam, he could transmit power over large distances and power high current devices.

[Rhapso]

It is interesting, that we are only now scratching on the surface of what Tesla did 100 years ago.

[tomjen3]

There is no kidding that he was off the charts brilliant, but he was also - especially towards the end - insane.

That is why it is so hard to figure out what Tesla actually did or didn't do.